Harry's Place, Pocket Billiard Parlor, Somerset, Pa. (Explanation of Trick)
Harry's Pocket Billiard Parlor, corner South Center and West Patriot St., above Kabots.
Although there are no instructions, the arrangement of numbers on this business card (for the entire front and back of the card, see below) is designed for use as a magic trick that allows you to tell someone's age (from 1 to 60).
The idea is to ask a friend to point out each grouping of numbers that contains his or her age. A 44-year-old, for instance, will identify the left and middle number groupings in the top row and the middle grouping in the bottom row as the ones that contain 44. To secretly calculate your friend's age, then, add together the numbers located in the top right-hand corner of each grouping. In this case, 8 + 32 + 4 = 44 (see the annotations in the image above).